This is an Ergonomics teaching manual for both University Undergraduates and Postgraduates in Tropical Forestry. The book has eight chapters. Chapter I: Defines What is Ergonomics, why study ergonomics in Forestry and the promotion of ergonomics in Tropics Chapter 2. Covers different food nutrients and energy requirements. Chapter 3. Body muscles, structure, muscular effort, and fatigue. Chapter 4. Physical working capacity, procedures for determining maximum oxygen or aerobic power and relative workload. Chapter 5. Anthropometer, workplace design and working posture Chapter 6. Occupational diseases; noise, vibration, and heat stress Chapter 7. Accidents and safety measures, factors contributing to accidents and consequences of accidents. Chapter 8. Ergonomics checklist; objectives and conditions to use ergonomics checklists.